Elbow brief introduction

Elbow
Is used to change the pipe to the elbow. Common elbow bending angle is 90 °, 45 ° and 180 °, 180 ° bend, also known as u-bend tube, also has a special angled elbow, but there are very few.
1. Ma steel elbow
Elbows malleable iron, also known as malleable iron elbow, threaded elbow is most common. This kind of malleable iron pipe, is mainly used for heating, plumbing and gas piping on. In the process, in addition to the need for frequent disassembly of low pressure pipe and other pipe is rarely used. Elbows malleable specification is relatively small, common specifications in the range of 1/2~4 inches, according to the different surface treatment-galvanized and galvanized not two.
2. pressed elbow
Suppression of elbow, said pressing elbows seamless elbows, is made of high quality carbon steel, stainless and acid-resistant steel and low alloy steel seamless tubes, in a special mould pressing. 1 time and a half times the diameter of the bending radius is nominal (R=1.5DN), can also be used on special occasions bending radius equal to the nominal diameter of the elbow (R=1DN). Within its specifications from DN20~600mm. Consistent with the table number of the seamless steel tube wall thickness range. Suppress elbow by professional factory or factory standard seamless pipe pressing together, elbows on both ends should be processed when the factory bevel.
3. stamping welding elbow
Stamping and welding elbows, is the use of sheet metal die stamping into half a ring-shaped elbow and elbow for welding two dollars and a half ring. The bending radius the same seamless elbow, specifications nominal diameter 200mm.
4. welding elbow
Welded elbows, also known as shrimp lumbar elbow or shrimp. Production method, there are two, one is in a processing plant with steel cutting, cut roll welding, used mostly by steel pipe matching. Another is the pipe cutting, welding by group, its specification is generally above 200mm. Temperature is not greater than 200 ℃, can be produced at the construction site.
5. high pressure elbow
High pressure elbow, are made of quality carbon steel or low-alloy steel forged together. Based on the connection type, elbows at both ends are processed into thread or Groove, the processing of high precision requires pipe threaded and flanged closely supporting freedom is screwed into the thread and not loose, applies to petrol-chemical pipes pressure 22.0, 32.0MPa, common specifications in the range of DN6~200mm.